Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.1091/CHE/2012 A
(19) INDIA
(22) Date of filing of Application :23/03/2012 (43) Publication Date : 21/06/2013
(54) Title of the invention : DISTRIBUTED FILE SYSTEM
(51) International classification :G06F (71)Name of Applicant :
(31) Priority Document No
:2011- 1)NEC CORPORATION
072790 Address of Applicant :7-1, SHIBA 5-CHOME, MINATO-
(32) Priority Date :29/03/2011 KU TOKYO 108-8001 Japan
(33) Name of priority country :Japan (72)Name of Inventor :
(86) International Application No
Filing Date
:NA
:NA
1)TAKEMOTO, TAIRA
(87) International Publication No : NA
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(57) Abstract :
A computer node connected with an upstream computer node and a downstream computer node so as to be capable of
communicating therewith has a replication file system of a master file system, a storing unit, and a controlling unit. The
controlling unit receives incremental data showing a changed part of the master file system from the upstream computer node,
stores the incremental data into the storing unit, reflects the incremental data on the file system, and transfers the incremental data
to the downstream computer node. Moreover, in a case that incremental data for plural times having received from the upstream
computer node and having not transferred to the downstream computer node yet are accumulated in the storing unit, the
controlling unit merges, with last received incremental data among the incremental data for plural times, the rest of the
incremental data for plural times.
No. of Pages : 58 No. of Claims : 9
The Patent Office Journal 21/06/2013 13810